update the example and add NSPhotoLibraryUsageDescription for image picker plugin to info.plist

example/ios/Runner/Info.plist

@@ -43,5 +43,7 @@
 	<false/>
 	<key>NSPhotoLibraryAddUsageDescription</key>
     <string>App needs photo library permission for saving images</string>
+    <key>NSPhotoLibraryUsageDescription</key>
+    <string>Used to demonstrate image picker plugin</string>
 </dict>
 </plist>

example/lib/main.dart

@@ -39,7 +39,9 @@ class _MyAppState extends State<MyApp> {
                   onPressed: () async {
                     File f = await ImagePicker.pickImage(
                         source: ImageSource.gallery);
+                    if (f != null) {
                       ShareExtend.share(f.path, "image");
+                    }
                   },
                   child: new Text("share image"),
                 ),
@@ -47,7 +49,9 @@ class _MyAppState extends State<MyApp> {
                   onPressed: () async {
                     File f = await ImagePicker.pickVideo(
                         source: ImageSource.gallery);
+                    if (f != null) {
                       ShareExtend.share(f.path, "video");
+                    }
                   },
                   child: new Text("share video"),
                 ),